Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual é a altura de quem nasceu antes de 1977?
 ###Tabelas: CREATE TABLE list_of_housing_and_construction_ministers (list_of_housing_and_construction_ministers_id AUTO_INCREMENT PRIMARY KEY, Minister VARCHAR, Party VARCHAR, Governments VARCHAR, Term start VARCHAR, Term end VARCHAR) CREATE TABLE parliamentary_elections (parliamentary_elections_id AUTO_INCREMENT PRIMARY KEY, Election INT, Number of PNC votes VARCHAR, Share of votes VARCHAR, Seats VARCHAR, Outcome of election VARCHAR) CREATE TABLE chronological_list_of_grand_slam_singles_titles_leaders (chronological_list_of_grand_slam_singles_titles_leaders_id AUTO_INCREMENT PRIMARY KEY, Years led VARCHAR, Span of years led INT, Player VARCHAR, Titles won at point of lead INT, Total Career titles INT, Tournament at which lead began VARCHAR) CREATE TABLE michigan_86_ohio_state_0 (michigan_86_ohio_state_0_id AUTO_INCREMENT PRIMARY KEY, Player VARCHAR, Position VARCHAR, Starter VARCHAR, Touchdowns INT, Extra points INT, Field goals INT, Points INT) CREATE TABLE [[_|_]] ([[_|_]]_id AUTO_INCREMENT PRIMARY KEY, Player VARCHAR, Height INT, Position VARCHAR, Year born INT, Current Club VARCHAR)  
SELECT COUNT Height FROM [[_|_]] WHERE Year born < 1977